keuangan/app/Domains/Billing/Models/InvoiceItem.php

<?php

namespace App\Domains\Billing\Models;

use Database\Factories\Billing\InvoiceItemFactory;
use Illuminate\Database\Eloquent\Factories\HasFactory;
use Illuminate\Database\Eloquent\Attributes\Fillable;
use Illuminate\Database\Eloquent\Attributes\UseFactory;
use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\Relations\BelongsTo;

#[Fillable([
    'code',
    'name',
    'quantity',
    'unit_price',
    'gross_amount',
    'discount_amount',
    'net_amount',
    'invoice_id',
    'product_id',
    'chart_of_account_id'
])]
#[UseFactory(InvoiceItemFactory::class)]
class InvoiceItem extends Model
{
    use HasFactory;

    public function product(): BelongsTo
    {
        return $this->belongsTo(Product::class);
    }

    public function chartOfAccount(): BelongsTo
    {
        return $this->belongsTo(ChartOfAccount::class);
    }
}